NORl'II AMKRICAN COI-EOPTKRA. 157 



claws become quite long, slender and more widely divergent. The 

 second joint of funicle is longer than the third in all, the tarsi very 

 slender, fourth joint very long, at least twice the length of the third, 

 which is broadly bilobed. 



In accordance with the general plan here pursued, the small num- 

 ber of species ^0|m a group possessing the characters of the section. 



Vestiius Group. 

 The species may be differentiated as follows : 



Elytra not ferruginous, claws moderate. 



Larger species, posterior tboracic angles rounded. 



More robust, prothorax strongly rounded on the sides, postocular lobes less 

 prominent, inconspicuously mottled with gray and pale ochreous scales. 



iiebiilosus. 

 IMore elongate, prothorax less rounded on the sides, postocular lobes promi- 

 nent, conspicuously mottled with white and yellow. ..oriisifi|»diili!«. 



Smaller, posterior thoracic angles not rounded, subrectangular fallax. 



Autennte, elytra and legs ferruginous; claws longer, scarcely connate at the base. 

 Prothorax more broadly rounded on the sides, not distinctly constricted at the 



apex ; elytral setae quite evident vestilu^i. 



Prothorax strongly rounded on the sides and strongly constricted at the apex, 

 shining; elytral setro scarcely noticeable COnilui.i^liiS. 



S. iiebulosiis n. sp. — Oval, piceous, robust; beak, antennae and legs rufo- 

 piceous, rather densely clothed with pale yellowish and grayish white oval scales, 

 mottled with ill-defined areas of a slightly darker shade. Beak rather slender 

 (female), feebly curved, about as long as head and prothorax, glabrous almost 

 throughout, densely punctured and scaly at the base, scales forming two promi- 

 nent tufts, basal incision not deep; scrobes oblique; second joint of autennfe 

 nearly twice as long as the third. Head very finely rugulose, front punctulate, 

 scaly. Prothorax wider than long, narrowed in front, strongly rounded on the 

 sides, broadly and markedly constricted at the apex, lateral margin continuing 

 in a curved line to the base, hind angles obsolete; surface densely and subcon- 

 fluently punctured, interspaces forming concentric rugae, punctures elongate- 

 oval, rather superficial, scales less dense on the disc. Scutel evident. Elytra 

 fully two-fifths wider at the ba.se than the basal thoracic margin, and but little 

 more than one-half longer than wide, feebly rounded on the sides, striae not 

 deeply impressed, punctures small, remote; interspaces (when denuded) some- 

 what shining, slightly rugulose, setae lotig. whitish, hair-like, a short line on the 

 base of third interspace white. Prosternum deeply emarginate, i)rothoracic lobes 

 feeble. Thighs not strongly clavate, tibiie slender, parallel, slightly widened at 

 the apex, terminal hooks distinct : articulating surface of i)osterior til)iai freely 

 open externally ; claws connate in their basal third. Leugtli 3.5 mm. ; 0.14 inch. 



Hub. — District of Columbia, Indiana, New Jersey. Dr. Horn's, 

 Mr. Ulke's and ray own collection. 



Five female specimens are before me. From perfidun, which it 

 reseml>les in size and the peculiar sculpture of the prothorax it is 



TRANS. AM. ENT. SOC. XXI. MAY, 1894. 



